package com.itheima.treeset;

import java.util.Random;

public class Demo01 {

    public static void main(String[] args) {
        Random r = new Random();
        for (int i = 0; i < 20; i++) {
            int number = r.nextInt(100) + 1;
            System.out.print(number+", ");
        }



    }
}
